Preheat your oven to 350°F.
Grate 2 cups of zucchini and set aside.
Prepare a 9×5” glass loaf pan by spraying with Pam and lining with parchment paper. Set aside.
In a medium bowl, whisk together the flour, cocoa, baking soda, and salt. Set aside.
In a large bowl, whisk the eggs, oil, water, sugar, and vanilla until smooth. Add in the dry ingredients and mix until just combined.
Mix in the grated zucchini, then fold in the mini chocolate chips.
Pour the batter into the prepared loaf pan and spread it into an even layer. If using, sprinkle more chocolate chips on top.
Bake for about 1 hour or until a toothpick comes out mostly clean.
Let it cool for around 15 minutes before slicing.